Question

if 1/a:1/b:1/c=3:4:5​

Answer 1

use dividendo first and then we get 1/3 ,1/4,1/5 first multiply all by 3 then 4 and then 5 you get the answer as 20:15:12

Answer 2

1/a=3k

a=1/3k

1/b=4k

b=1/4k

1/c=5k

c=1/5k

a:b:c=1/3:1/4:1/5

a:b:c=20:15:12